If you design an engine to take advantage of the high octane number of a high-ethanol blend (i.e., E20+), with a high compression ratio, etc., there is a lot to be gained. A higher compression ratio inherently makes the thermodynamic cycle more efficient, and the high octane number avoids the losses due to retarded combustion phasing that are necessary to avoid knock with gasoline.
Running certification tests on a high-ethanol blend doesn't, in and of itself, bring about those design changes. What it does is give the manufacturers a motivation to put all the extra work into really calibrating their engines twice for both a high-ethanol and a low-ethanol fuel, by actually giving them credit on CAFE, etc. The approach would also require that high-ethanol blends be available and actually be purchased by the consumers... there are more than a few barriers there, but research shows that it is possible to overcome the energy density penalty if the engine is optimized for E85.
The cars are tested with pure gas, but regulations require a certain amount of ethanol to be blended into the real-world gasoline supply (up to 10% and the lobby wants to raise it higher), and this drastically hurts efficiency.
Well, "drastically" might be a bit of an overstatement
You are correct on certifications being performed using E0 fuel, while E10 is the norm almost everywhere in the US. There is some desire to allow certifications using higher ethanol blends for flex-fuel vehicles, which would let automakers take advantage of some of the other fuel properties of ethanol (e.g., very high octane rating) to make engines more efficient (and have those efficiency gains actually count for CAFE purposes) and thus offset the energy density penalty.
Have you ever been target shooting? Having to reload a handgun after every three rounds would be a significant inconvenience, for no actual benefit. That's not to say that some sort of limit on high-capacity magazines may not have some effect, but 3 is probably going a bit far.
Also, shotguns are only limited to three rounds when used for hunting or trap/skeet competitions. You can easily find models that hold 7 rounds, e.g.
But Windows Phone does have apps. It has lots of apps, actually. Not the sheer numbers of iOS and Android just yet, though Microsoft's outreach efforts to developers, or their view of the strength of the platform, is such that the selection has been growing at the same rate Apple's did after their launch and faster than Androids. But I can't remember the last time I went to look for something in the Marketplace and came up empty.
You could add to that the issue of integrated features being good enough to make apps redundant (e.g. Bing Local Scout > Yelp!; Bing Music Search > Shazaam!; Bing Vison > tag reader apps; etc.), but all those apps are available regardless, along with all the other big names, and several have better UI experiences on WP than on iOS.
Really, the idea that there aren't apps available is FUD these days. That hasn't been a serious roadblock for a year or more, and the situation is improving all the time. And the presumptive ease of porting apps between WP8 and Win8 can only help in the future.
What Windows Phone really still lacks is consumer awareness, retail sales support, and marketing.
Beware of Programmers who carry screwdrivers. -- Leonard Brandwein